AirHint found the following cheapest return flights from Mexico City (MEX) to Bilbao (BIO) in December 2025 (see full year).
Return flights
| 25 Dec - 16 Jan | Iberia | ||
| 26 Dec - 12 Jan | Iberia | ||
| 28 Dec - 13 Jan | Aeromexico | ||
| 25 Dec - 04 Jan | Air France | ||
| 20 Dec - 03 Jan | Viva | ||
| 27 Dec - 12 Jan | Lufthansa |
Also check the deals for one-way flights from Mexico City to Bilbao in December.
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